Convert cli tests to use global CONF object

This commit takes all the uses of config in the cli tests and coverts
them to use the global CONF object.

Partially implements bp config-cleanup

Change-Id: I7a39839d7a4ebbf8372489507486ad2cac7f3adc
Convert all service clients to global CONF object

This commit takes the rest client and all subclass(all the service
clients) and converts all uses of config to the global CONF object.

Partially implements bp config-cleanup

Change-Id: I09525af4f1b308b91d45b7bbea05e0f734ea485c
Merge "Convert cli tests to use global CONF object"
Merge "Convert all service clients to global CONF object"